Patent GB-190218095-A (GB)
Title: Gearing for Bicycles, Motor Cars, Motors, Intermediate Motions and other Mechanical purposes.
Inventor: PEDERSEN MIKAEL
Filed: 1902-08-16
Granted: 1903-08-15
Abstract: 18,095. Pedersen, M. Aug. 16. Driving-mechanism; clutches; brakes.-Relates to driving variable-speed, reversing, and braking mechanism for bicycles, motor cars, &c. Fig. 1 shows an arrangement for locking together the driving-wheel and shell or hub of a clutch-driven hub. One or more rods a<2>, carried by a sliding ring a<3> and passing through the spoke flanges a<4>, are adapted to engage recesses or projections formed in or on the boss of the chain-wheel A. By moving the ring, the rods a<2> may be brought into engagement with the chain-wheel A so as to lock the same to the shell. The ring may be forced out of engagement by means of a spring. The rods a<2> may pass outside the clutch-ring B, or the recesses for the engagement of the rods may be formed in the driving-part of the clutch-ring, or in the brake block where a back-pedalling brake is employed. The ring a<3> may be arranged within the hub and operated by a wire, rod, &c. passing through the centre of the spindle a<5>, or through grooves cut in the spindle. Fig. 2 shows a brake operated upon reversal of the driving-wheel A. A flange c<1> on the shell C carries friction faces c', and a brake block E is provided with corresponding faces. Projections e<2> on the block E pass through the chain-wheel A and engage inclined surfaces on a loose ring H. The other edge of this ring has ratchet teeth adapted to engage teeth on a collar F fixed to the spindle. When the chain-wheel A is turned back, the projections e<2> ride up the inclines on the ring H, forcing the ring into engagement with the collar F and the block E into engagement with the friction faces on the flange c<1> so as to brake the shell C. Fig. 4 shows one arrangement of gearing. A spur-wheel a<6> carried on the chain-wheel A gears with a wheel J, mounted on a spindle K supported in bearings carried by the shell C. A wheel M on the spindle K gears with a wheel N mounted so as to slide, but not rotate, on the spindle P. Either of the wheels J, M may be clutch-mounted. Normally, the shell is driven direct through a clutch from the wheel A. By sliding the wheel N into gear with the wheel M, the shell is driven through the intermediate epicyclic gearing. By means of additional wheels on the spindles K, P, a number of speeds may be obtained. By altering the relative sizes of the wheels J, M, a reverse motion may be obtained. An intermediate wheel may be employed between the wheels M and N. The clutch is put out of action by means of projections on a ring &c. W, which is operated by a chain or rod passing along the spindle, or by a projection n' on the wheel N. The wheel N is moved against the resistance of a spring n<2>, by means of a cross-piece connected to one or more chains, wires, or rods passing through a hole or groove in the spindle P. The shell C may act as the driving-member and the wheel A as the driven member, such an arrangement being suitable for high-speed motors. Fig. 6 shows an arrangement of gearing suitable for motor work. In this case, one or more wheels M<2>, M<3> on the spindle K gear with the wheels T, S loosely-mounted on the spindle P. The spindle K is driven from the chain-wheel by toothed gear- ing. Either of the wheels T, S can be fixed by means of clutches U, V mounted so as to slide, but not rotate, on the spindle P. To drive the shell C direct, the wheel S is brought into frictional engagement with the shell at s<1>. A wheel, smaller than the wheel J, is mounted on the spindle K, and by sliding a non-rotating wheel v<3> into engagement with this wheel, a reverse motion is obtained. The clutches U, V are operated by rods v<1>, w<1> actuated by a screw and worm or cam, or rods &c. passing through the spindle P and attached to a sliding ring &c. on the spindle may be employed. This ring may be carried on a wheel-adapted to engage a wheel on the spindle K for obtaining an additional speed or a reverse motion. The shell C may carry a toothed wheel, chain-wheel, &c. for transmitting motion. In the Provisional Specification, a clutch is described. A chain-wheel &c. has ratchet teeth to engage shallow ratchet teeth on a clutch-ring mounted on the wheel. Deeper teeth on the inside of the ring are adapted to engage teeth on the shell or hub. When the ring is fully engaged with the shell, it is out of engagement with the wheel. When the wheel is moved forward, it carries the ring with it and both sets of teeth come into engagement thereby locking the wheel to the shell. Instead of teeth, the parts may have screw- formed faces or screw threads, or the shallow teeth in the ring and wheel may be replaced by friction faces.